I am using the Fluent theme implicitly (noxaml). If I use a standard Window as my main window, it appears correctly and the controls are properly themed.
However, if I change the main window to use RadWindow (and make the appropriate change to override OnStartup in App.xaml), at runtime the window does not appear.
I'm thinking that it may be that the RadWindow is rendering before the styling has been loaded. The RadWindow does render correctly in the designer.
Any thoughts on this?